<template>
  <div :class="{'hidden':hidden}" class="pagination-container">
    <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"/>
  </div>
</template>

<script lang="ts">
import { scrollTo } from '@/utils/scrollTo';
import { Component, Vue, Prop } from 'vue-property-decorator';

@Component
export default class Pagination extends Vue {
  @Prop()
  private total!: number;
  @Prop({ default: 1 })
  private page!: number;
  @Prop({ default: 20 })
  private limit!: number;
  @Prop({ default: () => [10, 20, 30, 50] })
  private pageSizes!: number[];
  @Prop({ default: 'total, sizes, prev, pager, next, jumper' })
  private layout!: string;
  @Prop({ default: true })
  private background!: boolean;
  @Prop({ default: true })
  private autoScroll!: boolean;
  @Prop({ default: false })
  private hidden!: boolean;

  get currentPage(): number {
    return this.page;
  }

  set currentPage(val: number) {
    this.$emit('update:page', val);
  }

  get pageSize(): number {
    return this.limit;
  }

  set pageSize(val: number) {
    this.$emit('update:limit', val);
  }

  handleSizeChange(val: number) {
    this.$emit('pagination', { page: this.currentPage, limit: val });
    if (this.autoScroll) {
      scrollTo(0, 800);
    }
  }

  handleCurrentChange(val: number) {
    this.$emit('pagination', { page: val, limit: this.pageSize });
    if (this.autoScroll) {
      scrollTo(0, 800);
    }
  }
}
</script>

<style scoped>
.pagination-container {
  background: #fff;
  padding: 32px 16px;
}
.pagination-container.hidden {
  display: none;
}
</style>
